BASALT-

-extrusive

GRAIN SIZE: 2MM.

COLOR: usually dark colored common colors are dark grey, dark green, black, and a brownish.

FORMATION: the outpouring of magma, the magma cools quickly forming only small crystals

WHATS FOUND IN IT: minerals from the silicate group, and large amounts of silicon and oxygen

WHERE IT FORMS: at the top of a valcano at the surphace

USES: it makes up most of the world